TERMODINAMIKA II Semester Genap TA 2007/2008
Sketsa Alat T-s Diagram 4 – Proses Pada Siklus Kompresi Uap Ideal Process 1-2 Isentropic Compression Process, s=const.: Compressor, sat.vap superheat vapor Process 2-3 P = const. Heat Rejection Process: Condenser, superheat vapor sat.liquid Process 3-4 Throttling Process, h=const.: Expansion Valve, sat. liquid mixture Process 4-1 P = const. Heat Addition Process : Evaporator, Mixture sat. vapor Sketsa Alat T-s Diagram Environment QH Condenser 3 Refrigerated Space QL Evaporator Environment QH Condenser 3 Compressor Win 2 1 Expansion Valve 4 P2 T s 1 2 3 2 Win QH P1 4 Expansion Valve 4 Win Compressor QL Refrigerated Space QL Evaporator 1
P-h Diagram T-s Diagram P-h Diagram P T P2 QH P1 QL s P2 P1 QH 1 2 3 Win Win 1 2 h4= h3 h1 h2 QH 4 4 QL QL
Dengan pemanasan dan pendinginan lanjut (superheated & subcooled) T-s Diagram P h P2 P1 P-h Diagram T s P2 1 2 QH 3 Win Win 1 2 ∆T Subcooled 4 h2 QH P1 3 4 ∆TSup QL QL h4= h3 h1 Refrijeren masuk compressor pada keadaan superheated vapor dan masuk katup ekspansi pada keadaan subcooled liquid
SiklusKompresi Uap Aktual (Fig. 10-7)
An Ordinary Household Refrigerator Ruangan Freezer dimana terjadi penyerapan kalor merupakan tempat evaporator. Koil di belakang refrigerator dimana kalor dibuang ke udara merupakan condenser.